The 2025 GMC Sierra 2500HD Denali offers an authoritative blend of premium luxury and maximum heavy-duty capability, finished in a commanding Onyx Black exterior. Powered by the legendary Duramax® 6.6L V8 turbodiesel engine delivering 470 horsepower and 975 lb-ft of torque, this powerful workhorse provides exceptional towing and payload performance through its heavy-duty Allison® 10-speed automatic transmission and a robust Autotrac® 4WD system with a two-speed transfer case for unwavering traction in the most demanding conditions.

The pinnacle Denali trim outfits the Sierra with distinctive 20-inch machined aluminum wheels, commercial-grade all-terrain tires, and a bold chrome grille with signature LED lighting. Inside, you'll find premium leather-appointed seating with heating and ventilation functionality, a heated leather-wrapped steering wheel, and elegant interior trim with authentic open-pore wood inlays. The spacious Crew Cab offers best-in-class rear legroom and ultimate comfort, along with dual-zone automatic climate control and a premium 12-speaker Bose® audio system with a 13.4-inch touchscreen.

Advanced technology features include the GMC Infotainment System with Google built-in, wireless Apple CarPlay® and Android Auto™ integration, and a 4G LTE Wi-Fi hotspot. The Sierra 2500HD Denali also boasts an available Advanced Trailering System, a 360-degree camera system with up to 15 camera views, and GMC Pro Safety Plus for ultimate control, convenience, and confidence when managing the heaviest loads.

Engineered for those who demand absolute capability with uncompromising luxury, this Sierra 2500HD delivers a substantial 22,500 pounds of maximum towing capacity and a 4,000-pound maximum payload when properly equipped, redefining the pinnacle of heavy-duty truck luxury and performance.

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